diff --git a/README.md b/README.md
index 9119f21..0dd0e60 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # go-mastodon
 
 [![Build Status](https://travis-ci.org/mattn/go-mastodon.png?branch=master)](https://travis-ci.org/mattn/go-mastodon)
-[![Coverage Status](https://coveralls.io/repos/mattn/go-mastodon/badge.png?branch=HEAD)](https://coveralls.io/r/mattn/go-mastodon?branch=HEAD)
+[![Coverage Status](https://coveralls.io/repos/github/mattn/go-mastodon/badge.svg?branch=master)](https://coveralls.io/github/mattn/go-mastodon?branch=master)
 [![GoDoc](https://godoc.org/github.com/mattn/go-mastodon?status.svg)](http://godoc.org/github.com/mattn/go-mastodon)
 [![Go Report Card](https://goreportcard.com/badge/github.com/mattn/go-mastodon)](https://goreportcard.com/report/github.com/mattn/go-mastodon)